CVE-2016-4473

CVE-2016-4473 is a critical-severity vulnerability in Php with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

• Severity: Critical (CVSS 3.x base score 9.8)
• CVSS v2: 7.5
• EPSS exploit prediction: 8% (94th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-416
• Affected product: Php
• Published: 2017-06-08
• Last modified: 2026-06-17

Description

/ext/phar/phar_object.c in PHP 7.0.7 and 5.6.x allows remote attackers to execute arbitrary code. NOTE: Introduced as part of an incomplete fix to CVE-2015-6833.

Frequently asked questions

What is CVE-2016-4473?

/ext/phar/phar_object.c in PHP 7.0.7 and 5.6.x allows remote attackers to execute arbitrary code. NOTE: Introduced as part of an incomplete fix to CVE-2015-6833.

How severe is CVE-2016-4473?

CVE-2016-4473 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-4473 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4473?

CVE-2016-4473 primarily affects Php. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-4473?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2016-4473 published?

CVE-2016-4473 was published on 2017-06-08 and last updated on 2026-06-17.

References

• http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00007.html
• http://rhn.redhat.com/errata/RHSA-2016-2750.html
• http://www.securityfocus.com/bid/98999
• https://bugzilla.redhat.com/show_bug.cgi?id=1347772

Affected products (34)

• cpe:2.3:a:php:php:5.6.0:alpha1:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.0:alpha2:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.0:alpha3:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.0:alpha4:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.0:alpha5:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.0:beta1:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.0:beta2:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.0:beta3:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.0:beta4:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.2:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.3:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.4:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.5:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.6:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.7:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.8:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.9:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.10:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.11:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.12:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.13:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.14:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.15:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.16:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.17:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.18:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.19:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.20:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.21:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.6.22:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:7.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise_module_for_web_scripting:12:*:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise_software_development_kit:12:sp1:*:*:*:*:*:*

More vulnerabilities in Php

• CVE-2015-0235 — Critical (CVSS 10.0): Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and other 2.x versions before 2.18,…
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• CVE-2012-2376 — Critical (CVSS 10.0): Buffer overflow in the com_print_typeinfo function in PHP 5.4.3 and earlier on Windows allows remote attackers to…
• CVE-2011-3268 — Critical (CVSS 10.0): Buffer overflow in the crypt function in PHP before 5.3.7 allows context-dependent attackers to have an unspecified…
• CVE-2009-4143 — Critical (CVSS 10.0): PHP before 5.2.12 does not properly handle session data, which has unspecified impact and attack vectors related to (1)…
• CVE-2008-5557 — Critical (CVSS 10.0): Heap-based buffer overflow in ext/mbstring/libmbfl/filters/mbfilter_htmlent.c in the mbstring extension in PHP 4.3.0…

All CVEs affecting Php →

Other CWE-416 (Use After Free) vulnerabilities

• CVE-2026-13782 — Critical (CVSS 10.0): Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
• CVE-2026-4725 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149…
• CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
• CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
• CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
• CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

Browse all CWE-416 (Use After Free) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

• 188.44.20.32 (ipv4-addr)